Batch file extracting all files from nested archives

Question

I have managed to leverage a powerful
forfiles command line utility with the mighty
7z compression program.
Below is a simple batch file extracting all files from nested archives hidden at any depth inside other archives and/or folders. After the extraction each archive file turns into a folder having the archive file name. If, for example, there was an "outer.rar"
archive file containing nothing but an "inner.zip" archive with only "afile.txt" inside, "outer.rar" becomes "...\outer.rar\inner.zip\afile.txt" file system path.
@echo off
rem extract_nested_archives.bat
move %1 "%TMP%"\%2
md %2
7z x -o%1 -y %TMP%\%2
del "%TMP%"\%2
for %%a in (zip rar jar z bz2 gz gzip tgz tar lha iso wim cab rpm deb) do forfiles /P %1 /S /M *.%%a /C "cmd /c if @isdir==FALSE extract_nested_archives.bat @path @file"
ARCHIVES ARE DELETED DURING THE EXTRACTION! Make a copy before running the script!
"7z.exe" and "extract_nested_archives.bat" should be in folders available via the %PATH% environment variable.
The first parameter of extract_nested_archives.bat is the full path name of the archive or folder that should be fully expanded; the second parameter is just the archive or folder name without the path. So you should run "c:\temp\extract_nested_archives.bat
c:\temp\outer.rar outer.rar" from the command line to completely expand "outer.rar". "c:\temp" must be the current folder.
Best regards, 0x000000AF

Answer 1

Incredibly useful!  Thank you so much.  I did make a couple of small changes to make the script a little easier to use from the end-user perspective.
First - I don't like making the user input the redundant second parameter, so I added this snippet which extracts it from the first parameter.  The first line of the snippet enables delayed expansion so that special characters in our file name don't
break anything.  The second line pulls the parameter into a variable, and the 3rd line uses delayed expansion on that new variable.  Before implementing delayed expansion I had problems with file paths which included parentheses.
SetLocal EnableDelayedExpansion
Set SOURCE=%1
For %%Z in (!source!) do (
set FILENAME=%%~nxZ
set FILENAME=%FILENAME:"=%
Anyway once that was done, I just used %FILENAME% everywhere in the script instead of
%2 (making sure to correct quotes as needed)
This way, to run my script all you need to run is:
C:\temp\extract_nested_archives.bat C:\temp\Archive.zip
Second - I didn't want to modify the Windows environment variable.  So I replaced
7z with "%PROGRAMFILES%\7-zip\7z.exe"
I also replaced extract_nested_archives.bat with "%~f0" (which represents the full path+filename of the current script).
Here is my full script now.  Tested on Windows 8 with the 64-bit version of 7-zip installed:
@echo off
Setlocal EnableDelayedExpansion
Set source=%1
For %%Z in (!source!) do (
set FILENAME=%%~nxZ
set FILENAME=%FILENAME:"=%
move /Y %1 "%TMP%\%FILENAME%"
md "%FILENAME%"
"%PROGRAMFILES%\7-zip\7z.exe" x -o%1 -y "%TMP%\%FILENAME%"
DEL "%TMP%\%FILENAME%"
for %%a in (zip rar jar z bz2 gz gzip tgz tar lha iso wim cab rpm deb) do (
forfiles /P %1 /S /M *.%%a /C "cmd /c if @isdir==FALSE "%~f0" @path @file"